DRS: CT-1040 ES

Form CT-1040ES, Connecticut Estimated Income Tax Payments are due on or before April 15, June 15, September 15, and January 15 for calendar year filers,. Fiscal year filers should follow federal filing dates. If the due date falls on a Saturday, Sunday, or legal holiday, the next business day is the due date. An estimate will be considered timely filed if received or if the date shown by the U.S. Postal Service cancellation mark is on or before the due date.  To find the form or further instructions, click here.


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Connecticut business taxpayers can electronically file most Connecticut business tax returns using the Taxpayer Service Center (TSC-BUS). The TSC is an interactive tool that provides a free, fast, easy, and secure way to conduct business with DRS. Click here for more information.